/*
 *
 * Most of this source has been derived from the Linux USB
 * project:
 * (C) Copyright Linus Torvalds 1999
 * (C) Copyright Johannes Erdfelt 1999-2001
 * (C) Copyright Andreas Gal 1999
 * (C) Copyright Gregory P. Smith 1999
 * (C) Copyright Deti Fliegl 1999 (new USB architecture)
 * (C) Copyright Randy Dunlap 2000
 * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
 * (C) Copyright Yggdrasil Computing, Inc. 2000
 *     (usb_device_id matching changes by Adam J. Richter)
 *
 * Adapted for U-Boot:
 * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */

/*
 * How it works:
 *
 * Since this is a bootloader, the devices will not be automatic
 * (re)configured on hotplug, but after a restart of the USB the
 * device should work.
 *
 * For each transfer (except "Interrupt") we wait for completion.
 */
#include <common.h>
#include <command.h>
#include <asm/processor.h>
#include <linux/ctype.h>
#include <asm/addrspace.h>
#include <asm/byteorder.h>


#define DD printf("### %s %d\n", __FUNCTION__, __LINE__);
//#define DD

#if (CONFIG_COMMANDS & CFG_CMD_USB)

#include <usb.h>
#ifdef CONFIG_4xx
#include <405gp_pci.h>
#endif

//#define USB_DEBUG

#ifdef	USB_DEBUG
#define	USB_PRINTF(fmt,args...)	printf (fmt ,##args)
#else
#define USB_PRINTF(fmt,args...)
#endif

#define USB_BUFSIZ	512

static struct usb_device usb_dev[USB_MAX_DEVICE];
static int dev_index;
static int running;
static int asynch_allowed;
static struct devrequest setup_packet;

/**********************************************************************
 * some forward declerations...
 */
int usb_hub_probe(struct usb_device *dev, int ifnum);
void usb_hub_reset(void);


/***********************************************************************
 * wait_ms
 */

void __inline__ wait_ms(unsigned long ms)
{
	while(ms-->0)
		udelay(1000);
}
/***************************************************************************
 * Init USB Device
 */

int usb_init(void)
{
	int result;
	void *ctrl;
	int i, start_index = 0;
        struct usb_device *dev;


	running=0;
	dev_index=0;
	asynch_allowed=1;
	usb_hub_reset();

        /* first make all devices unknown */
        for (i = 0; i < USB_MAX_DEVICE; i++) {
                memset(&usb_dev[i], 0, sizeof(struct usb_device));
                usb_dev[i].devnum = -1;
        }

        /* init low_level USB */
#define	CONFIG_USB_MAX_CONTROLLER_COUNT 1
        for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
                /* init low_level USB */
                printf("USB%d:   ", i);
                if (usb_lowlevel_init(i, USB_INIT_HOST, &ctrl)) {
                        puts("lowlevel init failed\n");
                        continue;
                }
                /*
                 * lowlevel init is OK, now scan the bus for devices
                 * i.e. search HUBs and configure them
                 */
                start_index = dev_index;
                printf("scanning bus %d for devices... ", i);
                dev = usb_alloc_new_device(ctrl);
                /*
                 * device 0 is always present
                 * (root hub, so let it analyze)
                 */
                if (dev)
                        usb_new_device(dev);

                if (start_index == dev_index)
                        puts("No USB Device found\n");
                else
                        printf("%d USB Device(s) found\n",
                                dev_index - start_index);

		running = 1;
        }

        USB_PRINTF("scan end\n");
        if (!running) {
                puts("USB error: all controllers failed lowlevel init\n");
                return -1;
        }

	return 0;
}

/******************************************************************************
 * Stop USB this stops the LowLevel Part and deregisters USB devices.
 */
int usb_stop(void)
{
	asynch_allowed=1;
	usb_hub_reset();
	return usb_lowlevel_stop(0);
}

/*
 * disables the asynch behaviour of the control message. This is used for data
 * transfers that uses the exclusiv access to the control and bulk messages.
 */
int usb_disable_asynch(int disable)
{
	asynch_allowed=!disable;

	return 0;
}

/*-------------------------------------------------------------------
 * Message wrappers.
 *
 */

/*
 * submits an Interrupt Message
 */
int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
			void *buffer,int transfer_len, int interval)
{
	return submit_int_msg(dev,pipe,buffer,transfer_len,interval);
}

/*
 * submits a control message and waits for comletion (at least timeout * 1ms)
 * If timeout is 0, we don't wait for completion (used as example to set and
 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
 * allow control messages with 0 timeout, by previousely resetting the flag
 * asynch_allowed (usb_disable_asynch(1)).
 * returns the transfered length if OK or -1 if error. The transfered length
 * and the current status are stored in the dev->act_len and dev->status.
 */
int usb_control_msg(struct usb_device *dev, unsigned int pipe,
			unsigned char request, unsigned char requesttype,
			unsigned short value, unsigned short index,
			void *data, unsigned short size, int timeout)
{
	if((timeout==0)&&(!asynch_allowed)) /* request for a asynch control pipe is not allowed */
		return -1;

	/* set setup command */
	setup_packet.requesttype = requesttype;
	setup_packet.request = request;
	setup_packet.value = swap_16(value);
	setup_packet.index = swap_16(index);
	setup_packet.length = swap_16(size);
	USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X\nvalue 0x%X index 0x%X length 0x%X\n",
		request,requesttype,value,index,size);
	wait_ms(10);
	dev->status=USB_ST_NOT_PROC; /*not yet processed */

	submit_control_msg(dev,pipe,data,size,&setup_packet);
	if(timeout == 0) {
		return (int)size;
	}
	while(timeout--) {
		if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
			break;
		wait_ms(1);
	}
	if(dev->status==0)
		return dev->act_len;
	else {
		return -1;
	}
}

/*-------------------------------------------------------------------
 * submits bulk message, and waits for completion. returns 0 if Ok or
 * -1 if Error.
 * synchronous behavior
 */
int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
			void *data, int len, int *actual_length, int timeout)
{
	if (len < 0)
		return -1;
	dev->status=USB_ST_NOT_PROC; /*not yet processed */
	submit_bulk_msg(dev,pipe,data,len);
	while(timeout--) {
		if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
			break;
		wait_ms(1);
	}
	*actual_length=dev->act_len;
	if(dev->status==0)
		return 0;
	else
		return -1;
}


/*-------------------------------------------------------------------
 * Max Packet stuff
 */

/*
 * returns the max packet size, depending on the pipe direction and
 * the configurations values
 */
int usb_maxpacket(struct usb_device *dev,unsigned long pipe)
{
	if((pipe & USB_DIR_IN)==0) /* direction is out -> use emaxpacket out */
		return(dev->epmaxpacketout[((pipe>>15) & 0xf)]);
	else
		return(dev->epmaxpacketin[((pipe>>15) & 0xf)]);
}

/*
 * set the max packed value of all endpoints in the given configuration
 */
int usb_set_maxpacket(struct usb_device *dev)
{
	int i,ii,b;
	struct usb_endpoint_descriptor *ep;

	for(i=0; i<dev->config.desc.bNumInterfaces;i++) {
		for(ii=0; ii<dev->config.if_desc[i].desc.bNumEndpoints; ii++) {
			ep=&dev->config.if_desc[i].ep_desc[ii];
			b=ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;

			if((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)==USB_ENDPOINT_XFER_CONTROL) {	/* Control => bidirectional */
				dev->epmaxpacketout[b] = ep->wMaxPacketSize;
				dev->epmaxpacketin [b] = ep->wMaxPacketSize;
				USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",b,dev->epmaxpacketin[b]);
			}
			else {
				if ((ep->bEndpointAddress & 0x80)==0) { /* OUT Endpoint */
					if(ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
						dev->epmaxpacketout[b] = ep->wMaxPacketSize;
						USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",b,dev->epmaxpacketout[b]);
					}
				}
				else  { /* IN Endpoint */
					if(ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
						dev->epmaxpacketin[b] = ep->wMaxPacketSize;
						USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",b,dev->epmaxpacketin[b]);
					}
				} /* if out */
			} /* if control */
		} /* for each endpoint */
	}
	return 0;
}

/*******************************************************************************
 * Parse the config, located in buffer, and fills the dev->config structure.
 * Note that all little/big endian swapping are done automatically.
 */
int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
{
	struct usb_descriptor_header *head;
	int index,ifno,epno;
	ifno=-1;
	epno=-1;

	dev->configno=cfgno;
	head =(struct usb_descriptor_header *)&buffer[0];
	if(head->bDescriptorType!=USB_DT_CONFIG) {
		printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
		return -1;
	}
	memcpy(&dev->config,buffer,buffer[0]);
	dev->config.desc.wTotalLength=swap_16(dev->config.desc.wTotalLength);
	dev->config.no_of_if=0;

	index=dev->config.desc.bLength;
	/* Ok the first entry must be a configuration entry, now process the others */
	head=(struct usb_descriptor_header *)&buffer[index];
	while(index+1 < dev->config.desc.wTotalLength) {
		switch(head->bDescriptorType) {
			case USB_DT_INTERFACE:
				ifno=dev->config.no_of_if;
				dev->config.no_of_if++; /* found an interface desc, increase numbers */
				memcpy(&dev->config.if_desc[ifno],&buffer[index],buffer[index]); /* copy new desc */
				dev->config.if_desc[ifno].no_of_ep=0;

				break;
			case USB_DT_ENDPOINT:
				epno=dev->config.if_desc[ifno].no_of_ep;
				dev->config.if_desc[ifno].no_of_ep++; /* found an endpoint */
				memcpy(&dev->config.if_desc[ifno].ep_desc[epno],&buffer[index],buffer[index]);
				dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize
					=swap_16(dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize);
				USB_PRINTF("if %d, ep %d\n",ifno,epno);
				break;
			default:
				if(head->bLength==0)
					return 1;
				USB_PRINTF("unknown Description Type : %x\n",head->bDescriptorType);
				{
					int i;
					unsigned char *ch;
					ch=(unsigned char *)head;
					for(i=0;i<head->bLength; i++)
						USB_PRINTF("%02X ",*ch++);
					USB_PRINTF("\n\n\n");
				}
				break;
		}
		index+=head->bLength;
		head=(struct usb_descriptor_header *)&buffer[index];
	}
	return 1;
}

/***********************************************************************
 * Clears an endpoint
 * endp: endpoint number in bits 0-3;
 * direction flag in bit 7 (1 = IN, 0 = OUT)
 */
int usb_clear_halt(struct usb_device *dev, int pipe)
{
	int result;
	int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);

	result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
		USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, endp, NULL, 0, USB_CNTL_TIMEOUT * 3);

	/* don't clear if failed */
	if (result < 0)
		return result;

	/*
	 * NOTE: we do not get status and verify reset was successful
	 * as some devices are reported to lock up upon this check..
	 */

	usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));

	/* toggle is reset on clear */
	usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
	return 0;
}


/**********************************************************************
 * get_descriptor type
 */
int usb_get_descriptor(struct usb_device *dev, unsigned char type, unsigned char index, void *buf, int size)
{
	int res;
 	res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
			USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
			(type << 8) + index, 0,
			buf, size, USB_CNTL_TIMEOUT);
	return res;
}

int usb_get_configuration_no(struct usb_device *dev,
			     unsigned char *buffer, int cfgno)
{
	int result;
	unsigned int length;
	struct usb_config_descriptor *config;

	config = (struct usb_config_descriptor *)&buffer[0];
	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
	if (result < 9) {
		if (result < 0)
			printf("unable to get descriptor, error %lX\n",
				dev->status);
		else
			printf("config descriptor too short " \
				"(expected %i, got %i)\n", 9, result);
		return -1;
	}
	length = le16_to_cpu(config->wTotalLength);

	if (length > USB_BUFSIZ) {
		printf("%s: failed to get descriptor - too long: %d\n",
			__func__, length);
		return -1;
	}

	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
	USB_PRINTF("get_conf_no %d Result %d, wLength %d\n", cfgno, result, length);
	config->wTotalLength = length; /* validated, with CPU byte order */

	return result;
}

/********************************************************************
 * set address of a device to the value in dev->devnum.
 * This can only be done by addressing the device via the default address (0)
 */
int usb_set_address(struct usb_device *dev)
{
	int res;

	USB_PRINTF("set address %d\n",dev->devnum);
	res=usb_control_msg(dev, usb_snddefctrl(dev),
		USB_REQ_SET_ADDRESS, 0,
		(dev->devnum),0,
		NULL,0, USB_CNTL_TIMEOUT);
	return res;
}

/********************************************************************
 * set interface number to interface
 */
int usb_set_interface(struct usb_device *dev, int interface, int alternate)
{
	struct usb_interface *if_face = NULL;
	int ret, i;

	for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
		if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
			if_face = &dev->config.if_desc[i];
			break;
		}
	}
	if (!if_face) {
		printf("selecting invalid interface %d", interface);
		return -1;
	}

	/*
	* We should return now for devices with only one alternate setting.
	* According to 9.4.10 of the Universal Serial Bus Specification
	* Revision 2.0 such devices can return with a STALL. This results in
	* some USB sticks timeouting during initialization and then being
	* unusable in U-Boot.
	*/
	if (if_face->num_altsetting == 1)
		return 0;

	if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	    USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, alternate,
	    interface, NULL, 0, USB_CNTL_TIMEOUT * 5)) < 0)
		return ret;

	return 0;
}

/********************************************************************
 * set configuration number to configuration
 */
int usb_set_configuration(struct usb_device *dev, int configuration)
{
	int res;
	USB_PRINTF("set configuration %d\n",configuration);
	/* set setup command */
	res=usb_control_msg(dev, usb_sndctrlpipe(dev,0),
		USB_REQ_SET_CONFIGURATION, 0,
		configuration,0,
		NULL,0, USB_CNTL_TIMEOUT);
	if(res==0) {
		dev->toggle[0] = 0;
		dev->toggle[1] = 0;
		return 0;
	}
	else
		return -1;
}

/********************************************************************
 * set protocol to protocol
 */
int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
{
	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
		USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
		protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
}

/********************************************************************
 * set idle
 */
int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
{
	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
		USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
		(duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
}

/********************************************************************
 * get report
 */
int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size)
{
	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
		USB_REQ_GET_REPORT, USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
		(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
}

/********************************************************************
 * get class descriptor
 */
int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
		unsigned char type, unsigned char id, void *buf, int size)
{
	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
		USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
		(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
}

/********************************************************************
 * get string index in buffer
 */
int usb_get_string(struct usb_device *dev, unsigned short langid, unsigned char index, void *buf, int size)
{
	int i;
	int result;

	for (i = 0; i < 3; ++i) {
		/* some devices are flaky */
		result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
			USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
			(USB_DT_STRING << 8) + index, langid, buf, size,
			USB_CNTL_TIMEOUT);

		if (result > 0)
			break;
	}

	return result;
}


static void usb_try_string_workarounds(unsigned char *buf, int *length)
{
	int newlength, oldlength = *length;

	for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
		if (!isprint(buf[newlength]) || buf[newlength + 1])
			break;

	if (newlength > 2) {
		buf[0] = newlength;
		*length = newlength;
	}
}


static int usb_string_sub(struct usb_device *dev, unsigned int langid,
		unsigned int index, unsigned char *buf)
{
	int rc;

	/* Try to read the string descriptor by asking for the maximum
	 * possible number of bytes */
	rc = usb_get_string(dev, langid, index, buf, 255);

	/* If that failed try to read the descriptor length, then
	 * ask for just that many bytes */
	if (rc < 2) {
		rc = usb_get_string(dev, langid, index, buf, 2);
		if (rc == 2)
			rc = usb_get_string(dev, langid, index, buf, buf[0]);
	}

	if (rc >= 2) {
		if (!buf[0] && !buf[1])
			usb_try_string_workarounds(buf, &rc);

		/* There might be extra junk at the end of the descriptor */
		if (buf[0] < rc)
			rc = buf[0];

		rc = rc - (rc & 1); /* force a multiple of two */
	}

	if (rc < 2)
		rc = -1;

	return rc;
}


/********************************************************************
 * usb_string:
 * Get string index and translate it to ascii.
 * returns string length (> 0) or error (< 0)
 */
int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
{
	unsigned char mybuf[USB_BUFSIZ];
	unsigned char *tbuf;
	int err;
	unsigned int u, idx;

	if (size <= 0 || !buf || !index)
		return -1;
	buf[0] = 0;
	tbuf=&mybuf[0];

	/* get langid for strings if it's not yet known */
	if (!dev->have_langid) {
		err = usb_string_sub(dev, 0, 0, tbuf);
		if (err < 0) {
			USB_PRINTF("error getting string descriptor 0 (error=%x)\n",dev->status);
			return -1;
		} else if (tbuf[0] < 4) {
			USB_PRINTF("string descriptor 0 too short\n");
			return -1;
		} else {
			dev->have_langid = -1;
			dev->string_langid = tbuf[2] | (tbuf[3]<< 8);
				/* always use the first langid listed */
			USB_PRINTF("USB device number %d default language ID 0x%x\n",
				dev->devnum, dev->string_langid);
		}
	}

	err = usb_string_sub(dev, dev->string_langid, index, tbuf);
	if (err < 0)
		return err;

	size--;		/* leave room for trailing NULL char in output buffer */
	for (idx = 0, u = 2; u < err; u += 2) {
		if (idx >= size)
			break;
		if (tbuf[u+1])			/* high byte */
			buf[idx++] = '?';  /* non-ASCII character */
		else
			buf[idx++] = tbuf[u];
	}
	buf[idx] = 0;
	err = idx;
	return err;
}


/********************************************************************
 * USB device handling:
 * the USB device are static allocated [USB_MAX_DEVICE].
 */


/* returns a pointer to the device with the index [index].
 * if the device is not assigned (dev->devnum==-1) returns NULL
 */
struct usb_device * usb_get_dev_index(int index)
{
	if(usb_dev[index].devnum==-1)
		return NULL;
	else
		return &usb_dev[index];
}


/* returns a pointer of a new device structure or NULL, if
 * no device struct is available
 */
struct usb_device *usb_alloc_new_device(void *controller)
{
        int i;
        USB_PRINTF("New Device %d\n", dev_index);
        if (dev_index == USB_MAX_DEVICE) {
                printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
                return NULL;
        }
        /* default Address is 0, real addresses start with 1 */
        usb_dev[dev_index].devnum = dev_index + 1;
        usb_dev[dev_index].maxchild = 0;
        for (i = 0; i < USB_MAXCHILDREN; i++)
                usb_dev[dev_index].children[i] = NULL;
        usb_dev[dev_index].parent = NULL;
        usb_dev[dev_index].controller = controller;
        dev_index++;
        return &usb_dev[dev_index - 1];
}


/*
 * By the time we get here, the device has gotten a new device ID
 * and is in the default state. We need to identify the thing and
 * get the ball rolling..
 *
 * Returns 0 for success, != 0 for error.
 */
int usb_new_device(struct usb_device *dev)
{
	int addr, err;
	int tmp;
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf_buf, USB_BUFSIZ);
	unsigned char *tmpbuf = KSEG1ADDR(tmpbuf_buf);

	/*
	 * Allocate usb 3.0 device context.
	 * USB 3.0 (xHCI) protocol tries to allocate device slot
	 * and related data structures first. This call does that.
	 * Refer to sec 4.3.2 in xHCI spec rev1.0
	 */
#ifdef CONFIG_USB_XHCI
	if (usb_alloc_device(dev)) {
		printf("Cannot allocate device context to get SLOT_ID\n");
		return -1;
	}
#endif

	/* We still haven't set the Address yet */
	addr = dev->devnum;
	dev->devnum = 0;

#ifdef CONFIG_LEGACY_USB_INIT_SEQ
	/* this is the old and known way of initializing devices, it is
	 * different than what Windows and Linux are doing. Windows and Linux
	 * both retrieve 64 bytes while reading the device descriptor
	 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
	 * invalid header while reading 8 bytes as device descriptor. */
	dev->descriptor.bMaxPacketSize0 = 8;	    /* Start off at 8 bytes  */
	dev->maxpacketsize = PACKET_SIZE_8;
	dev->epmaxpacketin[0] = 8;
	dev->epmaxpacketout[0] = 8;

	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, tmpbuf, 8);
	if (err < 8) {
		printf("\n      USB device not responding, " \
		       "giving up (status=%lX)\n", dev->status);
		return 1;
	}
	memcpy(&dev->descriptor, tmpbuf, 8);
#else
	/* This is a Windows scheme of initialization sequence, with double
	 * reset of the device (Linux uses the same sequence)
	 * Some equipment is said to work only with such init sequence; this
	 * patch is based on the work by Alan Stern:
	 * http://sourceforge.net/mailarchive/forum.php?
	 * thread_id=5729457&forum_id=5398
	 */
	struct usb_device_descriptor *desc;
	int port = -1;
	struct usb_device *parent = dev->parent;
	unsigned short portstatus;

	/* send 64-byte GET-DEVICE-DESCRIPTOR request.  Since the descriptor is
	 * only 18 bytes long, this will terminate with a short packet.  But if
	 * the maxpacket size is 8 or 16 the device may be waiting to transmit
	 * some more, or keeps on retransmitting the 8 byte header. */

	desc = (struct usb_device_descriptor *)tmpbuf;
	dev->descriptor.bMaxPacketSize0 = 64;	    /* Start off at 64 bytes  */
	/* Default to 64 byte max packet size */
	dev->maxpacketsize = PACKET_SIZE_64;
	dev->epmaxpacketin[0] = 64;
	dev->epmaxpacketout[0] = 64;

	/*
	 * XHCI needs to issue a Address device command to setup
	 * proper device context structures, before it can interact
	 * with the device. So a get_descriptor will fail before any
	 * of that is done for XHCI unlike EHCI.
	 */
#ifndef CONFIG_USB_XHCI
	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
	if (err < 0) {
		USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
		return 1;
	}

	dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
	/*
	 * Fetch the device class, driver can use this info
	 * to differentiate between HUB and DEVICE.
	 */
	dev->descriptor.bDeviceClass = desc->bDeviceClass;
#endif

	if (parent) {
		int j;

		/* find the port number we're at */
		for (j = 0; j < parent->maxchild; j++) {
			if (parent->children[j] == dev) {
				port = j;
				break;
			}
		}
		if (port < 0) {
			printf("usb_new_device:cannot locate device's port.\n");
			return 1;
		}

		/* reset the port for the second time */
		err = hub_port_reset(dev->parent, port, &portstatus);
		if (err < 0) {
			printf("\n     Couldn't reset port %i\n", port);
			return 1;
		}
	}
#endif

	dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
	dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
	switch (dev->descriptor.bMaxPacketSize0) {
	case 8:
		dev->maxpacketsize  = PACKET_SIZE_8;
		break;
	case 16:
		dev->maxpacketsize = PACKET_SIZE_16;
		break;
	case 32:
		dev->maxpacketsize = PACKET_SIZE_32;
		break;
	case 64:
		dev->maxpacketsize = PACKET_SIZE_64;
		break;
	}
	dev->devnum = addr;

	err = usb_set_address(dev); /* set address */

	if (err < 0) {
		printf("\n      USB device not accepting new address " \
			"(error=%lX)\n", dev->status);
		return 1;
	}

	mdelay(10);	/* Let the SET_ADDRESS settle */

	tmp = sizeof(dev->descriptor);
	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
				 tmpbuf, sizeof(dev->descriptor));
	if (err < tmp) {
		if (err < 0)
			printf("unable to get device descriptor (error=%d)\n",
			       err);
		else
			printf("USB device descriptor short read " \
				"(expected %i, got %i)\n", tmp, err);
		return 1;
	}

	memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
	/* correct le values */
	le16_to_cpus(&dev->descriptor.bcdUSB);
	le16_to_cpus(&dev->descriptor.idVendor);
	le16_to_cpus(&dev->descriptor.idProduct);
	le16_to_cpus(&dev->descriptor.bcdDevice);
	/* only support for one config for now */
	err = usb_get_configuration_no(dev, tmpbuf, 0);
	if (err < 0) {
		printf("usb_new_device: Cannot read configuration, " \
		       "skipping device %04x:%04x\n",
		       dev->descriptor.idVendor, dev->descriptor.idProduct);
		return -1;
	}
	usb_parse_config(dev, tmpbuf, 0);
	usb_set_maxpacket(dev);
	/* we set the default configuration here */
	if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
		printf("failed to set default configuration " \
			"len %d, status %lX\n", dev->act_len, dev->status);
		return -1;
	}
	USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
	      dev->descriptor.iManufacturer, dev->descriptor.iProduct,
	      dev->descriptor.iSerialNumber);
	memset(dev->mf, 0, sizeof(dev->mf));
	memset(dev->prod, 0, sizeof(dev->prod));
	memset(dev->serial, 0, sizeof(dev->serial));
	if (dev->descriptor.iManufacturer)
		usb_string(dev, dev->descriptor.iManufacturer,
			   dev->mf, sizeof(dev->mf));
	if (dev->descriptor.iProduct)
		usb_string(dev, dev->descriptor.iProduct,
			   dev->prod, sizeof(dev->prod));
	if (dev->descriptor.iSerialNumber)
		usb_string(dev, dev->descriptor.iSerialNumber,
			   dev->serial, sizeof(dev->serial));
	USB_PRINTF("Manufacturer %s\n", dev->mf);
	USB_PRINTF("Product      %s\n", dev->prod);
	USB_PRINTF("SerialNumber %s\n", dev->serial);
	/* now prode if the device is a hub */
	usb_hub_probe(dev, 0);

	return 0;
}

/*
 * Free the newly created device node.
 * Called in error cases where configuring a newly attached
 * device fails for some reason.
 */
void usb_free_device(void)
{
        dev_index--;
        USB_PRINTF("Freeing device node: %d\n", dev_index);
        memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
        usb_dev[dev_index].devnum = -1;
}

#include "usb_hub.c"

#endif /* (CONFIG_COMMANDS & CFG_CMD_USB) */

/* EOF */
